C#

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;

class Program
{
  [DllImport("User32", EntryPoint = "GetWindowPlacement")]
  private static extern bool GetWindowPlacement(IntPtr hWnd, [In] ref WINDOWPLACEMENT lpwndpl);

  private struct POINTAPI
  {
    public int x;
    public int y;
  }

  private struct RECT
  {
    public int left;
    public int top;
    public int right;
    public int bottom;
  }

  private struct WINDOWPLACEMENT
  {
    public int length;
    public int flags;
    public int showCmd;
    public POINTAPI ptMinPosition;
    public POINTAPI ptMaxPosition;
    public RECT rcNormalPosition;
  }

  static void Main(string[] args)
  {
    Process[] processes = Process.GetProcessesByName("notepad");
    IntPtr hWnd = processes[0].MainWindowHandle;

    if (hWnd != IntPtr.Zero)
    {
      WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
      placement.length = Marshal.SizeOf(placement);
      GetWindowPlacement(hWnd, ref placement);

      Trace.WriteLine(placement);
    }
  }
}